4428361561 has 4 divisors (see below), whose sum is σ = 4769004772. Its totient is φ = 4087718352.

The previous prime is 4428361547. The next prime is 4428361577. The reversal of 4428361561 is 1651638244.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2825560336 + 1602801225 = 53156^2 + 40035^2 .

It is a cyclic number.

It is not a de Polignac number, because 4428361561 - 2¹¹ = 4428359513 is a prime.

It is a super-3 number, since 3×4428361561³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4428361541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170321586 + ... + 170321611.

It is an arithmetic number, because the mean of its divisors is an integer number (1192251193).

Almost surely, 2^4428361561 is an apocalyptic number.

It is an amenable number.

4428361561 is a deficient number, since it is larger than the sum of its proper divisors (340643211).

4428361561 is a wasteful number, since it uses less digits than its factorization.

4428361561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340643210.

The product of its digits is 138240, while the sum is 40.

The square root of 4428361561 is about 66545.9357211242. The cubic root of 4428361561 is about 1642.1557958431.

The spelling of 4428361561 in words is "four billion, four hundred twenty-eight million, three hundred sixty-one thousand, five hundred sixty-one".